Question

What is the SI unit of moving coil galvanometer?

Answer 1

The SI unit of a moving coil galvanometer is the **Ampere (A)**, which measures electric current. The galvanometer itself is an instrument used to detect and measure small currents, often calibrated to provide readings in amperes.

Answer 2

The **SI unit** used for the measurement in a **moving coil galvanometer** depends on what quantity you are referring to. The moving coil galvanometer itself is an instrument used to detect and measure small electric currents. Let's break it down by different quantities:

1. **Current**: The primary function of a galvanometer is to measure **electric current**. The **SI unit of electric current** is the **ampere (A)**.

2. **Magnetic Flux Density**: A moving coil galvanometer operates based on the interaction of a current-carrying coil with a magnetic field. The **SI unit of magnetic flux density** is the **tesla (T)**.

3. **Deflection Sensitivity**: If you want to measure the deflection per unit current in the galvanometer, you would measure this in terms of **radians per ampere (rad/A)**.

4. **Torque**: The coil experiences a torque when a current passes through it in the presence of a magnetic field. The **SI unit of torque** is the **newton-meter (N·m)**.

Therefore, while the instrument itself doesn't have a single SI unit, the quantity it measures—**electric current**—is expressed in **amperes (A)**.